Patent GB-190508913-A (GB)
Title: An Improved Controlling System for Electric Railways.
Inventor: ZWEIGBERGK THORSTEN VON
Filed: 1905-04-27
Granted: 1906-04-26
Abstract: 8913. Zweigbergk, T. von. April 27. Switches.-Relates to a controlling- system for electric trains, in which each of two or more cars is provided with a master controller, the return current from the motors when in series and from one of the motors when in parallel on the car in which the master controller is operated being utilized to actuate the automatic switch controllers on the other cars. Each of three cars carrying an idle master controller receives current from the trolly T, Fig. 1, which, after passing through the motors, finds its ground through the line P<1> and contact-plate 8 of the controller if the motors are in series, or, if they are in parallel, half by this ground and half by the direct ground through Q<1>, Fig. 2. When the master controller, which is to be operated, is in its idle position as shown in Fig. 2, the reversing-switch being also in its 'off' position X, the circuits from the trolly T are broken at the contacts 30, 34 of the automatic reverser A and at the contact T<1> of the controller. On moving the controller, the contacts 69, T', 71, 70 momentarily engage the contacts 72-75, and, the reversing- switch being in its forward positon Y, a circuit is completed through the contacts TI, 73, &c., wire K, contacts 80, 82, wire G', and shunt coils 26, 27 of the reversers A, B to earth. The main circuit from the trolly T is thus completed through the magnet 18, motor A, resistances 96-103, motor B, and line P<1> to earth through the contacts 107, 108. On further movement of the controller to the position 1, the contacts 107, 108 leave the plate S, and the main circuit is now completed through the wire 113, contacts 114, 116, magnets 22, 23, and train wire g to earth at the end of the train, magnets corresponding to 22 and 23 being energized all along the train. When the controller is in the position 2, the contact C engages with the plate 120, completing the circuit through the magnet 13 and train wire C', and thus shortcircniting the resistances 96, 103. The remaining resistances are successively cut out by moving the controller through the positions 3, 4, 5. In passing from the last series position 5 to the first parallel position 6, the resistances are gradually cut in by the contacts F, E, D, C successively leaving the plates 126, 128, 122, 129. When in the position 6, part of the current passes through the magnets 19 and train wire i, thus completing the circuit from the trolly through the magnet 17, which rotates the lever 63, breaking connexion at the contact 64 and closing the circuit from the wire N through the wire Q<1> to ground. The main circuit current now passes in,parallel through the resistances 99-96 and 100-103, lines N', P, and motors A, B. From the motor A the current passes to ground through the lines N, Q<1>, while from the motor B the current passes through the line P<1>, contact 109, and reversing-switch to the train wire g. Further movement of the controller cuts out the resistances 96-103. The jumper connexions for three cars are shown in Fig. 1.